THE VERY BEST WORKING USED TUBE MADE 1959 IN GREAT BRITIAH. PLATE 1 TESTED 105% PLATE 2 TESTED 105%. YOU GET THE TUBE YOU SEE FOR THE PRICE. THIS ONE WORKS ABSOLUTLEY PERFECT. MADE WITH LARGE DOUBLE D D GETTERS.
Item Tag: Marconi
GZ34 tube 5AR4 Marconi by mullard f32 NOS Matched Pair
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6SN7 TUBE PAIR MARCONI VINTAGE VALVE PRE AMPLIFIER B65 33S30B VT231 6H8C CV1988
6SN7 MARCONI TUBE MATCHED PAIR (2 TUBES) MADE IN ITALY #FULLY TESTED AND MATCHED # PERFECT FOR PRE-AMPLIFIER # BEST SOUND # PHONO # PRE-AMP STAGE # PRE AMPLIFIER # DRIVER TUBE # DRIVER FOR 211 # BEST VALVE DRIVER # 1950’s TEST RESULTS: TUBE 1 TRIODE 1: 120 (WHERE 50=100%) TRIODE 2: 120 (WHERE 50=100%) TUBE 2 TRIODE 1: 120 (WHERE 50=100%) TRIODE 2: 120 (WHERE 50=100%) VERY RARE!! TOP CONDITIONS COPPIA E
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NOS Marconi DH30 VT133_GPO CV1695 Double Diode Triode Radio Vacuum Tube
Marconi / DH30 NOS MARCONI DH30 – VT133_GPO – CV1695 This listing is for 1 vintage tube. The Marconi DH30 is a VERY RARE English-made double diode triode tube. It is an excellent choice for radio restoration! Shipping via registered airmail with tracking number. Import fees for U.S. buyers are included in the shipping cost under the new tariff regulations. Other methods available upon request. Internal Reference (SKU): 407_7e851
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6sn7 tube gt Marconi Italy tubes amplifier preamp b65 vt-231 ecc33 33s30 valve
6sn7 tube gt Marconi Italy tubes amplifier preamp = b65 vt-231 ecc33 33s30 Made in Italy original Genuine Vintage sound from 1950’s ( 1 piece = 1 tube = one vacuum tube = 1 valve ) VALVE grey PLATE squared GETTER BOTTOM RUGGED PLATE BIG LARGE PLATES black thick BASE tested strong 110/110 on TV7DU ( reference good 50/50 ) D getter Double triode Socket Octal K8A Filament Heater Vf 6.3 Volt / If 0.6 Ampere / Indirect / Parallel, ~ = (AC/DC) The 6SN7 was used as an audio amplifier in the 1940-1955 period, usually in the driver stages of power amps. The designer of the famous Williamson amplifier, one of the first true high-fidelity designs, suggested use of the 6SN7 (or B65) in his 1949 revision since it is similar to the original circuit’s L63 (= 6J5 ) British single triodes, four of which were used in each channel of his 1947 circuit. VERY RARE TUBES VALVES FOR PRE AMPLIFIER PREAMP DRIVER box 77
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Pair of Marconi 12AX7 ECC83 Silver Plate Vacuum Tubes
Scarce pair of Spanish Marconi 12AX7 silver plate tubes. Very similar in construction to the more common Mazda silver plates. Slotted design, disc getters. Test results as shown in the table below from the Amplitrex AT1000.
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Pair Marconi 5814 Bent [] Getter Silver Plate Tabs Pewter Black Plates
The product is a pair of vintage Marconi 5814 vacuum tubes with bent getter and silver plate tabs. These tubes tube TESTED with tester where is70 considered good or nos tube 1 80/82 tube2 78/82 please view all pictures closely before buying pictures also part of describe item condition please have any questions before
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Marconi Silver Plate ECC83 12AX7 Tube Tested EX+ Gm/Emissions E83CC Like Mazda
This tube looks new but the fragile white print has been rubbed off. It tests excellent and perfectly balanced on both triodes for Gm & Emissions. TV7-D/U Gm test results 45/45 where minimum/good is 32 B&K 606 Emissions test results = 101/101 See photos for description and test results.